Comparative Analysis of Two Consecutive Genome Sequencing Results of Enterococcus Faecium Strain Entfacye

Document Type : Original Articles

Authors

1 Department of Medical Biotechnology, TMS.C., Islamic Azad University, Tehran, Iran.

2 Department of Pathobiology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.

3 Department of Research and Development, Pasteur Institute, Tehran, Iran.

4 Food Microbiology Research Center, Tehran University of Medical Sciences, Tehran, Iran.

10.32598/ARI.80.5.3339

Abstract

Introduction: The overuse of antimicrobials in healthcare has driven the emergence, persistence, and rapid spread of antimicrobial-resistant pathogens. Vancomycin-resistant enterococci (VRE), mainly Enterococcus faecium, have recently emerged as multi drug-resistant (MDR) bacteria worldwide. Consequently, enterococcal infections have become more challenging to treat due to their increased multiple-drug resistance. Studying the genome of an enterococcal isolate and investigating genome changes over time help researchers better understand the development of antimicrobial resistance in bacterial isolates.
Materials & Methods: In the present study, E. faecium EntfacYE isolate from a human biological sample was assessed. After phenotypic, biochemical,and molecular verifications of the bacterial isolate, the bacterial genome was completely sequenced.
Results: In total, the EntfacYE genomic subsystems contained 23 various categories with 46 antimicrobial resistance genes. In the current study, 31 antimicrobial resistance genes were reported in the subsystems, and 15 genes had no subsystems. Genes conferring tetracycline resistance were reported in this study. Increases in the number and type of antimicrobial resistance genes were recorded, indicating that bacteria are becoming rapidly resistant to available antimicrobials. 
Conclusion: In general, the study of antimicrobial resistance genes in bacteria can be effective in better understanding resistance patterns and mechanisms, which can lead to find novel protocols for limiting spread of antimicrobial resistance in bacteria.

Keywords

Archives of Razi Institute
Volume 80, Issue 5
September and October 2025
Pages 1321-1330

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